Polymer Journals

Applied Polymer Composites

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Title: Flame retardant composite of fibre glass-reinforced epoxy waste particles/polypropylene and its modeling
Page Range: p.119-130
Author(s): Onuoha F N; Ohanuzue C B C
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 2
Issue No: No.3

Abstract
Fibreglass reinforced epoxy (FGRE) composite wastes particles reinforced polypropylene has been developed and its modelling has been performed. FGRE wastes were ground and treated with latex to reduce itching of fibreglass and then dried and reground to obtain the powdered particulates that were used as reinforcements for polypropylene. The reinforcements have been size-classified as 150, 200, 250 and 300 microns and the composites have been injection moulded. Heat release rate and other flame properties have been evaluated by Oxygen Bomb Calorimeter. Ignition time, flame propagation rate, combustion time, heat of combustion and heat release rate have been measured. Results indicate that ignition time, combustion time and heat of combustion increase with increase in the amounts of FGRE particulate reinforcements, but the flame propagation rate and heat release rate decrease. FGRE waste particles give outstanding ignition time with increasing reinforcement contents in the composites, and therefore use of FGRE waste as reinforcement material in place of cheese wood fibre in polyolefin would help reduce deforestation and add value to the economy. Models have been developed. 9 Refs.

Title: Coated multiwall carbon nano tube reinforced epoxy composite with zinc borate additive and its flame retarding properties
Page Range: p.131-140
Author(s): Deepak Kumar; Pandey K N; Vishal Verma; Mishra R M
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 2
Issue No: No.3

Abstract
Composites of epoxy reinforced by polycarbosilane derived -silicon carbide coated multi wall carbon nano tubes (PCS-MWCNT) with zinc borate additive have been developed. With increasing reinforcement material, the composites exhibit decrease in tensile strength, flexural strength and impact strength but show an increase in tensile modulus, flexural modulus and thermal stability. SEM shows uniform and homogeneous dispersion of PCS-MWCNTs throughout the epoxy matrix. Flame retarding properties and limiting oxygen index of the composites improves with addition of zinc borate. 21 Refs.

Title: Polypropylene/wood flour and wheat husk hybrid composites
Page Range: p.141-150
Author(s): Pradeep Upadhyaya; Manoj Garg; Smita Mathur; Vijai Kumar; Nema A K
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 2
Issue No: No.3

Abstract
Wood flour and wheat husk have been treated using sodium hydroxide (NaOH) and benzoyl chloride and used with maleic anhydride-grafted polypropylene (MAgPP) and titanate coupling agent emulsion as reinforcement for polypropylene based hybrid composites with 10 to 50% reinforcements with equal amounts of wood flour and wheat husk. Density, melt flow index, heat deflection temperature, melting temperature and thermal degradation of the composites have been investigated along with reinforcement/matrix interactions. Density and heat deflection temperature of the composites increase with increasing contents of reinforcements, but melt flow index decreases. Melting and crystallisation temperatures are almost the same as those of the matrix. 18 Refs.

Title: Chitosan reinforced bisphenol-A glycidyldimethacrylate (BisGMA)/polyvinyl pyrrolidone (PVP) blend based composites
Page Range: p.151-166
Author(s): Praharaj A P; Behera D; Bastia T K; Rout A K; Rath P; Mohanty P
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 2
Issue No: No.3

Abstract
Chitosan (0, 10, 20, 30, 40, 50 wt%) reinforced 50/50 Bisphenol-A glycidyldimethacrylate (BisGMA)/polyvinyl pyrrolidone (PVP) blend based composites have been processed. Their tensile strength, Young's modulus, impact strength and hardness increase with increasing loading of chitosan, reach an optimum at 40 wt% and thereafter decrease with further increase in chitosan loading, whereas elongation at break decreases with chitosan content. Chemical resistance and ageing studies of the composites have been reported. 34 Refs.

Title: Coconut fiber reinforced high density polyethylene composites by compatibilizer process
Page Range: p.167-176
Author(s): Anshu Anjali Singh; Kishor Biswas; Dinesh Priyanka; Sanjay Palsule
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 2
Issue No: No.3

Abstract
Coconut fibre (CNF) reinforced high density polyethylene (HDPE) composites have been processed using maleic anhydride grafted high density polyethylene as compatibilisers by twin extrusion and injection moulding. Successful formation of the CNF/HDPE composites - evident from increasing mechanical properties of composites with increasing CNF in them - appears to have resulted from good fibre/matrix interfacial adhesion in CNF/HDPE composites due to the use of 1.2% maleic anhydride grafted high density polyethylene (MA-g-HDPE) as a compatibilisers. Mechanical properties of the composites decrease after moisture absorption. 10 Refs.

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